Explore 30,000 square feet of outdoor adventure space for FREE during our Joy Park Free Nights. We're keeping the exhibit open after hours from 4 - 8 pm (or dusk) on the third Friday of every month, May - September, thanks to a collaboration with Denver Parks and Recreation. Tips for a Great Visit: Prepare for climbing, digging, zip-lining, splashing, all-in play by bringing sunscreen, towels, a change of clothes and extra socks. Please note: These free nights include access to Joy Park only and are weather-permitting. Except for the restrooms, the inside of the Museum will be closed. Pets are not allowed in Joy Park. Service dogs are always welcome.